what will i need to do to run on this setup? it will bump my compression ratio to 11.7:1.....should i be lookig at injectors? cuz most likely i will be running lean....my current mods are intake, 68mm throttle body, 3-2-1 headers, no cat, no resonator, and lightweight crank pulley. will i be able to run SAFELY on pump gas? and i know it will have to be tuned to last...correct?

 

it wont work. h22 has a different compression height than the h23, if you put h22 pistons in a h23 block the pistons will hit the head.

 

u sure? cuz i been told different?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hOndafienD 04 &raquo;</TD></TR><TR><TD CLASS="quote">u sure? cuz i been told different?</TD></TR></TABLE>

you were told wrong..... we tried it, didnt work, nuff said

 

people say they are running it right now..did you try right year rods, pistons? etc.? your supposed to use 97+ pistons

 

you cant use 97+ pistons, they require a different wrist pin, 97+ engines all had a larger pin.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">you cant use 97+ pistons, they require a different wrist pin, 97+ engines all had a larger pin.</TD></TR></TABLE>

actually you can...you have to use the h23 rods, and have a machine shop make them accept floating wrist pin...

 

Could you run a thicker head gasket and get enough clearance? How thick does cometic make them? How far off was the clearance?

Pirate

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hOndafienD 04 &raquo;</TD></TR><TR><TD CLASS="quote">

actually you can...you have to use the h23 rods, and have a machine shop make them accept floating wrist pin... </TD></TR></TABLE>

i dont see how.. h22's have a higher compression height than h23's do, the only way to do it would be to use an offset bushing.

98+h22 pistons have the same compression height as all the rest of the h22 pistons.

 

Interested in this discussion! Why wouldn't it work? B-series pistons are interchangable; for example we can take CTR Pistons and put them on our LS Rods!


Just curious! An Allmotor H23 would be something to see! Good Luck!

 

if h22 pistons clear on a h23/vtec, why wouldnt it clear on a h23? i will try to find another post where they mentioned this...insteadof being 10.6:1 like usdm pistons would be on a h22 it would be 11.1:1 beacuse of the longer rods, etc.....but they do fit...you just need to buy floating wrist pistons and have them accepted on to the h23 rods.

 

so what exactly has to be done to make h22 pistons fit on an h23 and are h22 pistons really the best ones to use on an h23? what else is interchangeable and would need to be changed on a stock h23 bottom end to use h22 pistons and increase compression?

 

why not just buy Type S pistons; they are 11.2 factory CR

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">

i dont see how.. h22's have a higher compression height than h23's do, the only way to do it would be to use an offset bushing.

98+h22 pistons have the same compression height as all the rest of the h22 pistons.</TD></TR></TABLE>

Actually they dont. H23 pistons are dish, stock usdm H22 are flat top J spec and type S are dome

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">

you were told wrong..... we tried it, didnt work, nuff said</TD></TR></TABLE>

A stock h23 I put togther with Usdm h22 pistions thats been running in an Accord for over 20K miles since last year, so it CAN be done its not that hard. Just match the crank to the rods select your piston to desired compression easy way to make power without sleeving your block using stock honda parts Just like b- series.

Just my 2cents

 

what compression did you get in your h23 with usdm h22 pistons? thats what i plan on running real soon.

 

guestimating
USDM 10.4:1
J spec 11.0:1
TypeS 11.8:1

The compression is going to be higher then a H22 because the H23 has smaller combustion chamber on the head

 

what year pistons did u use?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by md23vtec &raquo;</TD></TR><TR><TD CLASS="quote">guestimating
USDM 10.4:1
J spec 11.0:1
TypeS 11.8:1

The compression is going to be higher then a H22 because the H23 has smaller combustion chamber on the head </TD></TR></TABLE>


Not bad compression numbers if you are correct.

 

he's a bit off....

usdm: 11.5:1
jdm: 12:1
type s: 12.x:1

something closer to that ^^^^ type s pistons wouldnt be streetable without major major tuning.